Permutation-lock.



No- 8l6,842- PATENTED APR. 3, 1906 G. E. BLEGHSCHMIDTL PERMUTATION LOCK.

APPLICATION FILED JULY6,1905.

UNITED STATES Arnn i FFIQF.

PERMUTATION-LOCK.

Specification of Letters Patent.

Patented April 3, 1906,

Application filed July 6,1905. Serial No. 268,425.

To otZZ whom it may concern:

Be it known that I, CHARLES E. BLEoH- SCHMIDT, a citizen of the United States, residing in Bellevue, in the county of Campbell and State of Kentucky, have inventedcertain new and useful Improvements in Permutation-Locks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My improvements relate to permutationlocks andv they consist of that certain novel construction and arrangement of parts to be hereinafter particularly pointed out and claimed, whereby the correct operation of the tumblers may be insured and the lock rendered very chflicult to pick or open by jarring or in any other way without the employment of the correct combination.

In the drawings, Figure 1 is a rear elevation with the side plate of the casing for the lock removed. Fig. 2 is a vertical section taken on the lines 2 2 of Fig. 1. Fig. 3 is a horizontal section taken 011 the lines 3 3 of Fig. 1.

1 is a portion of the door upon which the lock is mounted.

2 is the sliding bolt, actuated by the handle 3, connected by a spindle 4 with the crankarm 5, which engages within a slot 6 in the horizontal arm 7 of the bolt-bar for throwing back the bolt to release the door when the tumblers of the lock have been properly arranged to permit of this movement, as will be hereinafter described. The bolt in its horizontal movement is guided by the pins 8 8, secured to the frame and engaging slots 9 9 in the boltbar. I have shown in the form of bolt illustrated a very simple construction; but of course it will be understood that any well-known construction of sliding bolt or sliding bolts coupled together to lock the door at various points may be employed. The movement of the bolt is controlled by a series of movable tumblers.

10 is a dial-plate provided with a knob 11 for turning same mounted outside the door in the usual way on the spindle 12, which passes in through the door to the lock mechanism and carries a series of tumblers 13, 14, 15, and 16 in the present instance. In the construction illustrated the inner tumbler 13 is fast on the spindle 12, while the tumblers 14, 15, and 16 are loosely mounted thereon, and each of the tumblers is provided with screws or pins 17 in the pathway of each other as the tumblers are rotated. The outer tumblers 13 and 16 have such pin on their inner faces and the intermediate tumblers have a pin on both faces, so that by moving the dial-plate in a prearranged manner the various tumblers may be picked up by the movement of the plate, and ultimately the notches 18, one of which is formed in the periphery of each tumbler, will all be brought in line, so as to form an elongated slot.

19 is a bar or dog pivoted at 20 to the disk 21, which is mounted loosely on the screw 22, secured to the case. This dog 19 is provided .with a tongue 23 of proper shape to engage with the elongated slot formed by the notches 18 when the tumblers are located in line, so that by the proper rotation of the tumblers the dog can drop down by its own weight and disengage the shoulder 24 from behind the block 25 011 the case, and then the further movement of the dial plate and the tumblers will carry the dog 19 forward and partially rotate the disk 21, bring the slot 26 therein in line with the pin 27 on the bolt 2, which pin 27 normally bears against the periphery of the disk 21 and prevents the sliding of the bolt until by the proper arrangement of the tumblers the slot 26 shall be brought in line, when by actuating the handle 3 the bolt may be thrown. It will be understood that except when the tumblers are in proper alinement to allow the dog 19 to drop into the slot or gate in the tumblers that the tongue 23 of the dog rests on the periphery of the tumblers with the shoulder 24 behind the block 25, and consequently with the disk 21 with its slot 26 out of alinement of the pin 27 on the bolt, so that normally the bolt is prevented from any movement.

In p ermutat'iondocks it frequently happens that as the dial-plate is turned to leave the tumblers at the proper position to bring the slots thereof in alinement the tumblers may adhere to each other and the one left in its proper place be shifted by the movement of the adjoining tumblers. Then also where the tumblers are loosely mounted on their spindle by jarring or shaking the door the slots can be brought into alinement, so as to allow the dog to drop into place. As the tumblers wear and become loose on their bearings, it also frequently happens that the pins on the faces of the tumblers fail to contact properly, and instead of the one tumbler picking up its lIO fellow as the dial-knob is turned these pins maypass each other, resulting in a lock-out or failure of the combination to set the tumblers. In order to avoid these difliculties, I provide as follows: I arrange a brake-shoe 28 one for each tumbler with side flanges to embrace the periphery and side faces of the tum blers, each brake-shoe having a stud 29', sliding in a suitable recess in a support 30 on the bottom of the case, with a coiled spring 29 bearing between the top of the support and the shoe, so as to exert a spring-pressure on the tumbler. These spring-pressed shoes will hold the tumblers in any position to which they may be placed and will prevent one tumbler being disturbed in any way by the movement of the adjoining tumblers. These brake-shoes will also prevent any jarring or shaking of the door disturbing the position of the tumblers, and no matter what the wear the tumblers are always maintained in prop er alinement, so that no lockout can occur. It also might happen that after the tumblers have been set so as to allow the dog 19 to be released that by jarring the door the disk 21 might be moved so as to bring the slot 26 into alinement with the pin 27. In order to prevent this, I secure the weight 81 on the lower edge of the disk 21, so that the tendency of the rotationof this disk is to throw the slot 26 away from the pin 27, and no jarring of the mechanism will tend to carry the disk 21 in the direction to permit the pin 27 on the bolt to enter the slot 26.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a permutation-lock, the combination, with a series of tumblers, and a spindle upon which the same are loosely mounted, of shoes embracing the side faces of the tumblers to hold the same in parallel planes and means for holding the shoes in engagement with the tumblers to insure proper action thereof, substantially as described.

2. In a permutation-lock, the combination, with a series of tumblers, and a spindle upon which the same are loosely mounted, of springpressed shoes'embracing the peripheries and side faces of said tumblers to hold the same in alinement to insure proper action thereof, and to prevent displacement when set, substantially as described.

3. In a permutation-lock, the combination, with a series of tumblers with a notch in each tumbler, and a releasing-bar to enter said notches when the tumblers are brought into alinement, a slotted disk to which said bar is pivoted, and a projecting surface on the bolt to enter said slot when the disk is rotated by the movement of the releasing-bar, said disk being weighted to prevent movement in the proper direction, except when positively actuated, substantially as described.

CHARLES E. BLECHSCHMIDT.

Witnesses:

ERASTUS S. ALLEN, GLENA PRITOHARD. 

